Suppose a short red-flowered Species X plant is crossed with a short pink-flowered Species X plant. The percent of the resulting offspring with the geno- typc ttRr will most likely be closest to which of the following . Owo 25¥0 50I0 Eall tall short short short 40000000004 Passage 111 Study I In Trials 1-4, students deterniined D for beams with different l (see Table l). In every trial, W- 20 N and E=50xlO Nlm. In 3 studies, students investigated the stiffness of rec- tangular tnetal beams (see Figure l ). width of bea F- Icngth of bcam height of beam end view of beam Table I side view of beam Trial Figllre I Usin(y the apparatus shown in Figure 2, tbe students deformed each beam under a variety of condÉtions. load platfortn beaTll, side view roller di Study 2 In Trials 5-8, students dete[Ined D for beams composed of Metals S-V, respectively. Each metal had a different value of E (see Table 2). In every trial. W = 20 N andl-2.OxlO- m. Figure 2 Table 2 In cach trial, the beam being tested was suppoiled at 2 points that were O. 10 m apart and equidistant from the roidpoint of the beam. The beam wa5 subjected to a load, measllred in newLons (N), at the midpoint of the beatll. W was provided by weights placed on the plaLforni of the apparatus. During deformation. each beam beCae sliglLtIy U-shaped (see Figure 3). Trial Metal (IO, Nlm,) 25 50 75 100 (IO" m) side view of beam before defomation Study 3 In Trials 9-12. students determined D for different W (gee Table3). In every trial, 1-2.OxlO En and E=50xlO NJM,. side view of beam defornied a distance D Figure 3 A dial on the apparatus rcgistered the distance, D, the beam was deformed in multiples of 10 After D was mca- sured, the load was removed, and the beatn Teturned to its original shape. Table 3 Trial (N) (10- m) The intrinsic stiffness of the metal composing a beam was represented by Young's modulus, E. The effect of the widtb and height of a beam (see Figure l) oll D was 10 .20 30 40 10 11 12 rFiven in tn represented by the quantity J, . 40000000004
